Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Your thumb is about the same size as your nose.
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The human brain uses approximately as much energy as a 10 watt light bulb.
120
In one day, adult lungs move about 10,000 litres of air.
11
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
A human being loses an average of 40 to 100 strands of hair a day.
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